Influence of PrCl₃/PrF₃ on the optical and spectroscopic properties of fluorogallate and fluoro-gallo-indate glasses

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• 作者：C. Duverger-Arfuso ; B. Boulard ; Y. Jestin ; M. Ferrari and A. Chiasera
• 关键词：Fluoride glasses ; Praseodymium ; Infrared luminescence ; Lifetime
• 刊名：Optical Materials
• 出版年：2006
• 期刊代码：81_09253467
• 类别：ch
• 出版时间：March 2006
• 卷：28
• 期：4
• 页码：441-447
• 文件大小：219 K

摘要

Thermal, optical and spectroscopic properties of fluorogallate PZG (PbF₂–ZnF₂–GaF₃) and fluoro-gallo-indate PIG (PbF₂–InF₃–GaF₃) glasses doped with PrCl₃ and PrF₃ have been investigated. Absorption and luminescence properties of these glasses have been studied in the visible and in the second telecom window around 1.3 ;c;m. Fluorescence lifetimes of the ¹G₄ level have been compared between praseodymium chloride and fluoride doped glasses. Longer decay constants have been obtained for PrCl₃ doping at low concentration (0.05 mol%). This effect has been related to a reduction of both the phonon energy in the surrounding of the rare earth ion and the electron–phonon coupling, leading to a decrease of the non-radiative multiphonon relaxation rate.